Wisconsin's recall tests conservatives' ground game, Nick Carey reports:

A Walker victory would be highly symbolic for the right. Conservatives respect and fear the "ground game" labor unions use to get Democrats out to vote, above all in the manufacturing state of Wisconsin. So a win for Governor Scott Walker, who has maintained a single-digit lead in polls over his Democratic opponent, Milwaukee Mayor Tom Barrett, would be seen as a major conservative victory.

But successfully marshaling a grassroots activist army in Wisconsin is about more than just bragging rights. It would also help bring in more money for conservative grassroots efforts ahead of November's presidential election.

Wisconsin's recall election is a "unique opportunity" for both sides because it is a high-profile race in a battleground state before the presidential election, said Charles Franklin, a professor of law and policy at Marquette University in Milwaukee.

Local conservative groups are doing their own thing. But national groups are pouring resources into the race. In the days running up to the election,  Americans for Prosperity -- which is funded by Charles and David Koch, the billionaire brothers who own oil and gas conglomerate Koch Industries -- boosted its staff in Wisconsin to 60 from seven.

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Walker faces a recall vote because of a law he championed that severely curtails the power of public sector labor unions in the state. Here are the details of the law:

* Collective bargaining is limited to the issue of wages, and wage increases are capped at the rate of inflation, with a voter referendum needed for larger increases.

* Under the law, state and local government workers must increase contributions to 5.8 percent of the cost of their pensions, or 6.55 percent of salary if they are executives, and double contributions to their health insurance premiums to 12.6 percent. This resulted in an average cut in take-home pay of about 8 percent for a large swath of union members such as teachers.

* The law prohibits employer collection of union dues and members of collective bargaining units would not be required to pay dues. Union contracts are limited to one year, and collective bargaining units would have to take annual votes to maintain certification as a union. The law requires 51 percent of the entire unit voting in favor rather than a majority of those voting, to approve certification. Unions particularly object to this provision because it is a hard barrier to clear.

Barrett in Kenosha tonight rallying with union workers. Walker is in Milwaukee for late night campaign stop. #wirecall #wisunion

Obama For America calling for volunteers with text messages to get out the vote for Barrett tomorrow. #wisunions #wirecall

Sun Times says $ from Illinois making its way to Wisconsin to fund Recall campaigns. www.suntimes.com

RT @DavidShuster: Hello Madison. Live from Wisconsin @current @jengranholm in 15 minutes. I'll talk politics of Walker investigation a ...

JS describes Walker as "anxious" to have recall behind him.
www.jsonline.com
#wisunion #wirecall

Intrade predicts 94 percent chance Walker wins tomorrow. #wisunion #wirecall
www.intrade.com

200 Walker supporters at Serb Hall. #wirecall

Things got testy betwn Walker supporters, protesters after Serb Hall rally for gov. Police arrived. Supporters left. Protesters protested.

"I'm here tonight to ask for your vote to move Wisconsin forward," Walker said @ Serb Hall Monday night. #wirecall #wisunion

Voters out in force throughout the Milwaukee area. Some are relieved its over, while others want the fighting to stop. #wisunions #wirecall

"We are going to kick them in the butt" said William Temple, a Tea Party activist in full Tea Party garb at Walker's rally Monday. #wirecall

We vote a lot in Wi. www.foxnews.com #wisunions #wirecall

Van drove past the Whitefish Bay Library with a massive "Stand With Walker" sign attached to it. #wisunions #wirecalls

Voters are being reminded: no cell phones, no political swag at the polls. #wirecall #wisunion

RT @WaukeshaPatch: Voter turn out at Waukesha City Hall is about 27% right now. #WIRecall

Wisconsin loves its beer, even on day of historic recall election. Milwaukee bar offers $1 off with after voting. #wirecall #wisunion

RT @abauter: GAB predicts 60-65% #wirecall turnout. Clerks in key districts incl MKE, Madison & MKE suburbs (Brookfield, New Berlin, ...

RT @MaddowBlog: "Wild" turnout in Wisconsin - remember when they challenged voter registration parties? maddowblog.msnbc.msn.com